After go live query

Hi,

If the go live is Nov '16 for the financial year Apr '16 -17.

Then,

1. Will it be right to keep the first period open as Oct'16?

2. Can the upload of RG balances for excise, vat, service tax of 31 Oct can be uploaded later date?

2. Can the open invoices in AP and AR be uploaded from standard form without taxes at a later date?

3. which of the GL accounts ending balances from trial balance should be uploaded considering point 2,  and can it be done at later date

Please advise

Thanks

mythson